Insulator.



C. ROSEN-BERG & Y. T. BAILEY.

INSULATOR.

APPLIUATION FILED MAB.18, 1908.

Patented Dec. 8, 1908.

y N0.. H o ,MQW (y lll-/ Y 0 @El 1 LN zu,

2 i. the wires.

. nnirnn srnalnsiiignnr orrron CHARLES ROSENBERG AND VERNON T. BAlLEY, OF NEW YORK, N. Y.

No. 906,296.k

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed March'18, 1908. Serial No. 421,903. A

To all whom fit may concern:

Be it known that we, CHAnLns hosnN- BERG and VERNON T. BAILEY, citizens of the United States, and residents of the city of New York, Coney lsland, borough of Brooklyn, in the county oi Kings and State of New York, have invented a new Yand Improved Insulator, of which the -following is a full, clear, and exact description. i

' This invention is an improvement in insulators such as used in connection with incandescent electric lamps, and has for its purpose to relieve the binding screws or posts of the strain incident to strin ging and stretching W e accomplish this by constructing the insulator of a base of insulating material having posts arranged at opposite sides and rigid therewith, certain ofthe posts having conductor connections with a central 1. socket, and a cover of insulating material ber adapted comprising a ring member adapted to pass over the socket, having caps rigid therewith covering the posts with the conductor connections, and caps separate from the ring memto bindingly engage the insulation of the wires.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference f indicate corresponding parts in all the views.

Figure 1 is a perspective view of the preferred embodiment of our improved insulator complete Fig. 2 is a plan of the same with a portion of the cover removed and Fig. 3 is a section substantially on the line 3-3 of Fig. 2, looking in the direction of the arrow.

The insulator as preferably constructed is made up of a base 5 of'suitable insulating material, ordinarily porcelain, having posts 6 at opposite sides integral therewith, the common diameters of the posts at one side being substantially parallel to a like diameter of the posts at the opposite side. The central portion of the insulator as well as the posts presents a substantially circular form, as viewed in plan, and the posts project a slight distance below the central portion in order that a :firm seating will be given to the insulator when it is secured in place, screwholes 7, as shown in Fig. 2, being provided for this latter purpose.

The upper face of the base 5 is provided with grooves leading from diametrically or diagonally opposite posts, in which are located metallic strips or conductors 8 and 9,

l respectively, both strips having their 'outer extremities upwardlyr turned and provided with binding screws 10, 'the lower ends of which are received in' ksuitable recesses formed in the base, as shown in Fig. 3. The strip 9 is oitset and passes through an. inwardly-inclined slot to the under side of the center of the base, and they stripS passes directly to the center of the upper or outer l' face of the, base where it is constructed 1n the form of a washer and receives an insulating plug 11, ordinarily of porcelain. The diameter of this plug is reduced at opposite sides, the inner portion projecting into a rel cess of the base, and the plug has a central opening through which passes a screw 12 threaded into the stripv 9, and at its head forming in connection with the -adj acent washer, one of the terminals of the socket, the other terminal of the socket being produced by the shell 13 in connection with the strip or washer 8, as is the usual practice. The upper facesY oi the posts 6 are constructed with cross grooves which intersect with the grooves in which the strips 8 and 9 are located, and receive the insulated conductors or wires 14, which, as shown in F ig. 2, make electrical contact with the strips 8 and 9 under the action of the binding screws 10.

The base of the insulator is provided with a cover of insulating material, ordinarily of porcelain, which consists of a central ring member 15 fitting over the shell of the socket and caps 16 and 16a arranged on the posts, the caps 16 covering the conductor connections and formed integral with the ring member, and the caps 16a separate from the ring member and detachably connected to their respective posts by screws tion of the cover constituted by the ring member 15 and the caps 16 is held in place in any suitable manner, as byaset screw 15a binding on the shell 13. The caps are grooved for receiving the upper or outer portion of the conductors, and the caps 16a clamp the insulation of the conductors and relieve the binding screws 10 of strain, as when strinving and stretching the wires.

The insulator is especially constructed for outside work where it will ordinarily project horizontally from its support, in which position water would tend to collect in the grooves of the base, especially around the socket member. In order to avoid this a drain groove 18 is formed in the top face of 17. That pOrthe base at substantially right-angles to the grooves in which the conducting strips are located and intersects the base of the socket.

Having thus described our invention, we

screws arranged over opposite posts, a socket shell projecting substantially centrally from the base from one of said conductors, an insulating plug within the shell, seated on the claim as new and desire to secure by Letters conductor to which the shell is connected and Patent:

l. An insulator comprising a base of insulating material, having posts arranged at opposite sides, a socket projecting substantially centrally from the base, having conductor connections on opposite posts, and a cover of insulating material for the base, comprising a ring member arranged over the socket and caps on the posts, with the caps on the posts covering the conductor connections rigid with the ring member, and the other caps separable therefrom.

2. An insulator comprising a base of insulating material, a socket carried by the base, having conductor connections, and a cover or' insulating material fitting over the socket and having ca s for coveringsaid connections nd caps for inding the conductors to the ase.

3. An insulator comprising a base of insulating material, having posts at opposite sides, a socket centrally projecting from the base, and a cover of insulating material tting over the socket and having caps arranged on the posts.

4. An insulator comprising a base of insulating material, having posts arranged at opposite sides, conductors having binding having a substantially central opening, a screw passing through the o ening ot the plug and threaded into the ot er conductor, and a cover of insulating material having a ring member fitting over the shell and caps arranged on the posts.

5. An insulator `comprising a base of insulating material, having posts at opposite sides, certain of which are provided with conductor connections, and a cover of insulating material having caps arranged over the posts, with the caps covering the conductor connections rigidly connected, and the other caps separate therefrom for clamping the conductors.

6. An insulator comprising a base of insulating material, having posts at opposite sides, certain of which are provided with conductor connections, and a cover of insulating material having caps arranged over the posts.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

CHARLES ROSENBERG, VERNON T. BAILEY.

Witnesses: C. R. VAN BUsKiRK,

CHARLES D. CHILD. 

